16th ISPRS Congress: Supplement

Bibliographic data

Multivolume work

Persistent identifier:: 874247535

Title:: Die Königlich Preussische Landes-Triangulation

Sub title:: Abrisse, Koordinaten und Höhen sämmtlicher von der Trigonometrischen Abtheilung der Landesaufnahme bestimmten Punkte

Year of publication:: 1903

Place of publication:: Berlin

Publisher of the original:: Im Selbstverlage

Identifier (digital):: 874247535

Language:: German

Editor:: Königlich Preußische Landesaufnahme

Document type:: Multivolume work

Volume

Persistent identifier:: 875018165

Title:: Regierungsbezirk Merseburg und Herzogtum Anhalt

Sub title:: mit 10 Beilagen

Scope:: VIII, 619 Seiten

Year of publication:: 1904

Place of publication:: Berlin

Publisher of the original:: Im Selbstverlage

Identifier (digital):: 875018165

Illustration:: Karten

Signature of the source:: Md. 9200(15)

Language:: German

Usage licence:: Public Domain Mark 1.0

Editor:: Königlich Preußische Landesaufnahme

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: Abrisse.

Document type:: Multivolume work

Structure type:: Chapter

Section

Title:: 523. Auleben II. (III. 0.) - [588. Beuditz. (III. 0.)]

Document type:: Multivolume work

Structure type:: Section

) Case AIBI X y ntal)|(vertical) ; 0,007 ) 0,008 ) 0,009 2 0,011 : 0,012 | 0,017 1 0,024 / 0,097 lts remain 1 pixel, we s a mean e factor is he simpler >s of 4, the bly larger Pixel number of fx. fy [1/1000 pix] auo Signal area 1607 8 Signal area [pix] 100 7] 100 FIG. 7: Residuals as a function of peri- pherical pixels 9i i +50 involved in the DCP 5 signal number (Table 3) 2 1 Peripherical 30 50 100 Pl FIG.7 shows the dependency of residuals after the DCP in function of the number of involved peripherical pixels. If we take the pixel size (PS) for "resolution", the achieved maximum pointing accuracy (PA) of the digital camera is simply expressed by: PA PS (8) mayo 400 This is true for signal 1 (750 pixels involved) down to signal 4 (120 pixels involved), i.e. independant from the geometrical resolution. The results are tolerable down to the threshold, where the number of peripherical pixels is equal to the number of pixels involved in the signal area, which is the case for Pp = 12: PAmin = 3PAmax for d = 4PS (9) Below this value the geometric resolution will not be tolerable any more for pointing purposes. We have to observe that the results are based on the internal accuracy of the DCP and are valid only for the used HITACHI/VTE camera system. The basic results of this empirical investigation, however, will be confirmed for digital cameras in general. 3.4 Interpretability from Digitized Aerial Photography This again is a standard task in photogrammetry, but difficult to define rigorously, in contrast to the pointing accuracy. For testing purposes a conventional aerial photo (23 cm x 23 cm, c = 152 mm) was taken, showing the center of the city of Karlsruhe / FRG (see FIG.8). In this paragraph the question will be as follows: "What is the impact of geometrical resolution on the interpretability of a conventional scene for a digital camera?" For this purpose the transparency of the photography was registered by the digital camera system. The available field of 512 by 512 pixels was matched to the peripherical road of Karlsruhe, of 2200 m diameter, with the. castle in the center. Hence 1 pixel in the image corresponds to 2200 m/512 - 4.3 m. One has to point out that this value does not allow to conserve the resolution of the original image, which was determined to be around 40 Lp/mm. This leads to 0,9 m for 1 Lp at the ground, which theoretically is an order of magnitude better than 4.3 m pixel size. 1-69

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